Shuttle



7, 1940. H BURDETT 2,200,213

SHUTTLE Filed May 11, 1939 INVENTOR. Hoe/10E H BUEDETT BY ATTORNEY.

Patented May 7, 1940 UNITED r rsir orrics SHUTTLE Horace H. Burdett, Milford, .Mass., assignor to Draper Corporation, Hopedale, Mass, a ccrporation of Maine Application May 11, 1939, Serial No. 273,065

10 Claims.

The present invention pertains to loomshuttles and more particularly relates to the construction and mounting of the bobbin gripping spring of such shuttles.

Shuttles oi the type to which my invention applies commonly include a shuttle body havin a bobbin receiving cavity and a spring receiving recess at one end of such cavity, a bobbin grip ping spring having opposed jaws located in the spring receiving recess by Wear or expansion of the wood of the'shuttle results in the. spring becoming loose. Such prior constructions are subject to the further disadvantage that with use the spring sags downward and thereby objectionably lowers the tip of the bobbin. No prior adjusting means to correct this latter defect, of which I am aware, has been successful or used commercially. I

A principal object of the present invention is to provide a loom shuttle comprising a shuttle body with a cavity and recess, a shuttle spring, and fastening screws, as aforesaid, and means, actuated by a horizontal screw passing transversely through the shuttle body and the shank of the spring, for clamping the shank laterally against one side wall of the recess, to thereby prevent the spring from becoming loose when the recess becomes enlarged.

A further object is to provide, in a shuttle as aforesaid, novel and practical means for vertically adjusting the bobbin gripping jaws of the shuttle spring to thereby properly position the tip of the bobbin in the shuttle. I

The foregoing and other objects of the invention are accomplished in the construction illustrated on the accompanying drawing, of which:

Fig. l is a plan view of one end of a shuttle having the preferred embodiment of my invention applied thereto; I

Fig. 2 is a horizontal sectional View of the same;

Fig. 3 is a view in cross-section taken approximately on line 33 of Fig. l; and

Fig. i is a detail view,'in perspective, showing the adjusting bushing 'used in said preferred embodiment, I

The shuttle shown on the drawing comprises bobbin 3 with a tight fit.

a bottom plate [2. .floor It of the recess 1, the spring shank rests 8 of the recess l. I proper vertical position by the plate l2 resting on a shuttle body. l of the usual size and shape, having the usual cavity 2 therein for receiving a which is adapted to carry the filling supp-1y used in weaving. The thread delivery end of the shuttle is of any suitable usual construction and is accordingly not shown or described. The end 'of the shuttle shown carries a bobbin gripping spring for releasably holding the bobbin 3 by the butt portion 4 thereof, which spring is supported in the shuttle body in accordance with the present invention.

As shownthe aforesaid bobbin gripping spring comprises a shank portion 5 and bobbin gripping portions in the form of jaws 5. The shuttle body i has a recess '5 at one .end thereof communicating with the cavity 2, which recess has parallel vertical side walls 8 extending longitudinally of the shuttle. The shank portion .5 of the'spring is seated in this recesspreferably The jaws 6 project from the recess l into the cavity 2 on opposite sidesof the bobbin butt and are of spring steel construc- 'tion to releasably grip the'bobbin. The shank portions of the jaws may be integrally joined as x The shuttle construction shown includes'a conventional form of spring cover, so-called, which consists of a strip of metal bent to form a top plate it, an inclined bobbin guide portion .II and The plate l2 rests on the on the plate l2, and the top plate lllengages the top of the spring shank. The spring cover and the spring are heldtogether, by a vertical fastening member in the form of a screw M which passes throughthe top and bottom plates ii) and I2 and between the shank portions 5. This assembly is held in the shuttle body l .by

a horizontal fastening member such as screw structions, the shuttle springin a new shuttle is held against lateral movement by the. walls Also, the jaws 6 are held in fioor i3 of the recess. Thus, when the recess '1 becomes enlarged by wear or from other cause the spring shank becomesloose in the recess and in the absence of other: holding means the spring would be free to move laterally. Alsofwear of the floor l3 and other parts will allow the jaws 6 to drop down, thereby lowering the tip of the bobbin 3 from its proper position.

In prior constructions, the aforesaid loosening of the shuttle spring and lowering of the tip of the bobbin have been of serious consequence, and the problems of preventing or correcting the same have been vexatious and long standing. As will appear, I have solved such problems in a simple and practical manner.

The problem of preventing the shuttle spring from becoming loose in the shuttle body is solved by providing means for clamping the shank of the spring against one of the vertical walls of the recess, so that the spring is held tightly regardless of the size of the recess. In a shuttle of the particular construction shown on the drawing, the shank portion '5 is clamped against one of the vertical walls 8 by a metallic clamping member which may be carried by and is acted upon by the fastening member or screw l5. In the preferred embodiment, said'clamping mem ber consists of a bushing IS.

The bushing I6 is generally tubular in form and the hole ll therethrough is of the proper size to loosely receive the screw l5. positioned on the screw with the end I8 of the bushing engaged by the head I 9 of the screw either directly or through the means of intervening washers 20 as may be desired. The bushlatter against the opposite wall 8 of the recess 1, thereby holding the spring tightly regardless of the size of the recess.

The prior difficulties caused by the lowering of the bobbin gripping jaws are overcome by the provision of practical and eflicient means for adjusting the vertical position of the jaws. In accordance with my invention, the adjusting means is carried by the horizontal holding screw for raising and lowering the bobbin gripping jaws, the adjustment preferably being about an axis parallel to such holding screw.

In the particular embodiment shown, the aforesaid adjusting means, consists of an eccentric bushing, formed by providing an extension 22 on the bushing IS. The extension 22 is eccentric with relation to the external periphery of the bushing l6 and with relation to the hole 17 therethrough. This eccentric portion 22 extends through and is journalled in a hole in the shank portion 5. The spring is arranged to rock about an axis which is parallel to the screw l5, and to this end the lower edge of the shank portion 5 is beveled or tapered at 23, Fig. 3, to provide a fulcrum edge 24. This edge 24 extends transversely of the shank portion 5 and rests on. the plate l2, whereby the spring may rock on the plate. The bushing l6 may be provided with a screw driver slot 25 for convenience in turning the bushing.

In the embodiment shown, if through wear or other cause the jaws 6 drop too low, the screw IE is removed (leaving the bushing I6, 22 in place) and the bushing is turned slightly by means of a screw driver engaged with slot 25. This turning of the bushing raises the jaws 6 by rocking the spring, counterclockwise on Fig. 3, about the axis 24. Then, when the screw I5 is replaced it will firmly hold the bushing and spring "in adjusted position.

The bushing is Having fully disclosed the preferred embodi ment of my invention, I claim:

1. A loom shuttle comprising a shuttle body member and actuated thereby for clamping said shank portion against one of said side walls of said recess.

2. A loom shuttle comprising a shuttle body having a bobbin receiving cavity and a recess communicating with said cavity, said recess having longitudinally extending side walls, a bobbin gripping spring comprising a shank portion seated in said recess and opposed gripping portions projecting into said cavity, a horizontal fastening screw passing transversely through both sides 1 of said shuttle body and through said shank portion for fastening said spring in said shuttle body, and means carried by said screw and actuated thereby to clamp said shank portion against one of said side walls of said recess.

3. A loom shuttle comprising a shuttle body having a bobbin receiving cavity and a recess at one end of said cavity, said recess having substantially parallel longitudinal side walls, a bobbin gripping spring comprising ,opposed spring jaws having integrally joined shank portions seated in said recess and gripping portions projecting into said cavity, a screw member pass- .35

ing transversely through said shuttle body and shank portions for fastening said spring in said shuttle body, and a metallic clamping member actuated by said screw member to clamp said shank portions against one ofsaid side walls of said recess.

4. A loom shuttle comprising a shuttle body having a bobbin receiving cavity and a recess communicating with said cavity, said recess having longitudinally extending side walls, a bobbin gripping-spring having a shank portion seated in said recess, a horizontal fastening screw passing transversely through said shuttle body and said shank portion, and a member having a shoulder extending around said screw and bearing against said shank portion, said screw being arranged to force said shoulder against said shank'portion to thereby clamp the latter against one of said side walls of said recess.

5. A loom shuttle comprising a shuttle body having a bobbin receiving cavity and a recess at one end of said cavity, said recess having longitudinally extending side walls, a bobbin gripping, spring comprising a shank portion seated in said recess andopposed gripping jaws projecting into said cavity, a horizontal fastening screw passing transversely through said shuttle body and said shank portion, and a bushing on said screw, said bushingacting on said shank portion and being engaged by the head of said screw to thereby bushing having a shoulder bearing against said shank portion and amend engaged by the head of said screw to thereby clamp said spring in said recess when said screw is tightened.

7. A loom shuttle comprising a shuttle body,

a bobbin gripping spring having a shank portion seated in a recess at one end of said shuttle body, a horizontal fastening screw passing transversely through said shuttle body and said shank portion for fastening said spring in said shuttle body, said spring being mounted for adjustment about an axis parallel to but spaced from said screw, and means on said screw for adjusting said spring about said axis.

8. A loom. shuttle comprising a shuttle body, a bobbin gripping spring having a shank portion seated in a recess at one end of said shuttle body, a horizontal fastening screw passing transversely through said shuttle body and said shank portion for fastening said spring in said shuttle body, said spring being arranged to rock about an axis parallel to said screw, and an eccentric bushing on said screw for adjusting said spring about said axis.

9. A loom shuttle comprising a shuttle body' comprising a shank portion seated in said recess and opposed gripping jaws projecting into said cavity, said shank portion being fulcrumed on said plate, a horizontal fastening screw passing transversely through said shuttle body and said shank portion, and an eccentric bushing on said screw for adjusting said spring about said fulcrum.

10. A loom shuttle comprising a shuttle body having abobbin receiving cavity and a recess at one end of said cavity, said recess having side walls and a fioor,'a plate fnember on saidfloor, a bobbin gripping spring comprising a shank portion seated in said recess and opposed grip ping jaws projecting into said cavity,,the lower edge of said shank portion being tapered to provide a transverse fulcrum edge resting on said plate, a horizontal fastening screw passing transversely through said shuttle body and said shank portion, and an eccentric bushingon said screw for adjusting said spring about said fulcrum, said bushing having a shoulder engaging one side of said shank portion and an end engaged by the head of said screw to thereby clamp said shank portion against the opposite side wall of said recess.

HORACE H. BURDETT. 

